Learning Center - What is a cloud firewall? What is firewall-as-a-service (FWaaS)?

A cloud firewall protects cloud infrastructure from attacks, just as a traditional firewall protects on-premise networks. A cloud firewall is a security product that, like a traditional firewall, filters out potentially malicious network traffic. Unlike traditional firewalls, cloud firewalls are hosted in the cloud. This cloud-delivered model for firewalls is also called firewall-as-a-service (FWaaS).

Cloud-based firewalls form a virtual barrier around cloud platforms, infrastructure, and applications, just as traditional firewalls form a barrier around an organization’s internal network. Cloud firewalls can also protect on-premise infrastructure. Learn more in the Cloudflare Learning Center.


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